Singapore shares remained in the red zone on Tuesday, tracking regional losses as investors continued their apprehensive response towards the stalling peace talks between the US and Iran.

The Straits Times Index (STI), a key benchmark for the Singapore Exchange, ranged between 4,882.01 and 4,930.02 throughout the day. It ended the session at 4,887.69, down 5.04 points or 0.1% compared to Monday's close.

AEM SGD, Boustead up nearly 6%; YZJ Maritime, Bumitama Agri up around 4%; Seatrium up over 2%; Frasers Property, ComfortDelGro down nearly 2%.

On the corporate front, shares of H2G Green surged nearly 17% at the close as its subsidiary, GasHubUnited Utility, commissioned a major liquefied natural gas facility in Singapore.

Mooreast zoomed over 12% as its unit, Mooreast Asia, plans to divest a leasehold property in Singapore.

Meanwhile, shares of Addvalue Technologies closed over 9% lower even though it received new orders worth around $2.9 million for its space connectivity business.